ClabureDB: Classified Bug-Reports Database

  /*
   *  cx18 mailbox functions
   *
   *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  *  02111-1307  USA
  */
 
 #include <stdarg.h>
 
 #include "cx18-driver.h"
 #include "cx18-io.h"
 #include "cx18-scb.h"
 #include "cx18-irq.h"
 #include "cx18-mailbox.h"
 
 #define API_FAST (1 << 2) /* Short timeout */
 #define API_SLOW (1 << 3) /* Additional 300ms timeout */
 
 #define APU 0
 #define CPU 1
 #define EPU 2
 #define HPU 3
 
 struct cx18_api_info {
         u32 cmd;
         u8 flags;                /* Flags, see above */
         u8 rpu;                        /* Processing unit */
         const char *name;         /* The name of the command */
 };
 
 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }
 
 static const struct cx18_api_info api_info[] = {
         /* MPEG encoder API */
         API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,                0),
         API_ENTRY(CPU, CX18_EPU_DEBUG,                                 0),
         API_ENTRY(CPU, CX18_CREATE_TASK,                         0),
         API_ENTRY(CPU, CX18_DESTROY_TASK,                         0),
         API_ENTRY(CPU, CX18_CPU_CAPTURE_START,                  API_SLOW),
         API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP,                   API_SLOW),
         API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE,                  0),
         API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME,                 0),
         API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,               0),
         API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE,         0),
         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN,                   0),
         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE,                 0),
         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION,           0),
         API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM,               0),
         API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE,        0),
         API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING,              0),
         API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE,                 0),
         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS,           0),
         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE,                 0),
         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE,                 0),
         API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS,            0),
         API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM,              API_SLOW),
         API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO,            0),
         API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT,                  0),
         API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID,                  0),
         API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID,                  0),
         API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE,              0),
         API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE,              0),
         API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION,     0),
         API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO,               0),
         API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME,           0),
         API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM,           0),
         API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER,      0),
         API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS,                    0),
         API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK,                        0),
         API_ENTRY(CPU, CX18_CPU_DE_SET_MDL,                        API_FAST),
         API_ENTRY(CPU, CX18_APU_RESETAI,                        API_FAST),
         API_ENTRY(CPU, CX18_CPU_DE_RELEASE_MDL,                        API_SLOW),
         API_ENTRY(0, 0,                                                0),
 };
 
 static const struct cx18_api_info *find_api_info(u32 cmd)
 {
         int i;
 
         for (i = 0; api_info[i].cmd; i++)
                 if (api_info[i].cmd == cmd)
                         return &api_info[i];
         return NULL;
 }
 
static struct cx18_mailbox __iomem *cx18_mb_is_complete(struct cx18 *cx, int rpu,
                u32 *state, u32 *irq, u32 *req)
{
        struct cx18_mailbox __iomem *mb = NULL;
        int wait_count = 0;
        u32 ack;

        switch (rpu) {
        case APU:
                mb = &cx->scb->epu2apu_mb;
                *state = cx18_readl(cx, &cx->scb->apu_state);
                *irq = cx18_readl(cx, &cx->scb->epu2apu_irq);
                break;

        case CPU:
                mb = &cx->scb->epu2cpu_mb;
                *state = cx18_readl(cx, &cx->scb->cpu_state);
                *irq = cx18_readl(cx, &cx->scb->epu2cpu_irq);
                break;

        case HPU:
                mb = &cx->scb->epu2hpu_mb;
                *state = cx18_readl(cx, &cx->scb->hpu_state);
                *irq = cx18_readl(cx, &cx->scb->epu2hpu_irq);
                break;
        }

        if (mb == NULL)
                return mb;

        do {
                *req = cx18_readl(cx, &mb->request);
                ack = cx18_readl(cx, &mb->ack);
                wait_count++;
        } while (*req != ack && wait_count < 600);

        if (*req == ack) {
                (*req)++;
                if (*req == 0 || *req == 0xffffffff)
                        *req = 1;
                return mb;
        }
        return NULL;
}

long cx18_mb_ack(struct cx18 *cx, const struct cx18_mailbox *mb)
{
        const struct cx18_api_info *info = find_api_info(mb->cmd);
        struct cx18_mailbox __iomem *ack_mb;
        u32 ack_irq;
        u8 rpu = CPU;

        if (info == NULL && mb->cmd) {
                CX18_WARN("Cannot ack unknown command %x\n", mb->cmd);
                return -EINVAL;
        }
        if (info)
                rpu = info->rpu;

        switch (rpu) {
        case HPU:
                ack_irq = IRQ_EPU_TO_HPU_ACK;
                ack_mb = &cx->scb->hpu2epu_mb;
                break;
        case APU:
                ack_irq = IRQ_EPU_TO_APU_ACK;
                ack_mb = &cx->scb->apu2epu_mb;
                break;
        case CPU:
                ack_irq = IRQ_EPU_TO_CPU_ACK;
                ack_mb = &cx->scb->cpu2epu_mb;
                break;
        default:
                CX18_WARN("Unknown RPU for command %x\n", mb->cmd);
                return -EINVAL;
        }

        cx18_setup_page(cx, SCB_OFFSET);
        cx18_write_sync(cx, mb->request, &ack_mb->ack);
        cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq);
        return 0;
}


static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
{
        const struct cx18_api_info *info = find_api_info(cmd);
        u32 state = 0, irq = 0, req, oldreq, err;
        struct cx18_mailbox __iomem *mb;
        wait_queue_head_t *waitq;
        int timeout = 100;
        int cnt = 0;
        int sig = 0;
        int i;

        if (info == NULL) {
                CX18_WARN("unknown cmd %x\n", cmd);
                return -EINVAL;
        }

        if (cmd == CX18_CPU_DE_SET_MDL)
                CX18_DEBUG_HI_API("%s\n", info->name);
        else
                CX18_DEBUG_API("%s\n", info->name);
        cx18_setup_page(cx, SCB_OFFSET);
        mb = cx18_mb_is_complete(cx, info->rpu, &state, &irq, &req);

        if (mb == NULL) {
                CX18_ERR("mb %s busy\n", info->name);
                return -EBUSY;
        }

        oldreq = req - 1;
        cx18_writel(cx, cmd, &mb->cmd);
        for (i = 0; i < args; i++)
                cx18_writel(cx, data[i], &mb->args[i]);
        cx18_writel(cx, 0, &mb->error);
        cx18_writel(cx, req, &mb->request);

        switch (info->rpu) {
        case APU: waitq = &cx->mb_apu_waitq; break;
        case CPU: waitq = &cx->mb_cpu_waitq; break;
        case EPU: waitq = &cx->mb_epu_waitq; break;
        case HPU: waitq = &cx->mb_hpu_waitq; break;
        default: return -EINVAL;
        }
        if (info->flags & API_FAST)
                timeout /= 2;
        cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq);

        while (!sig && cx18_readl(cx, &mb->ack) != cx18_readl(cx, &mb->request)
               && cnt < 660) {
                if (cnt > 200 && !in_atomic())
                        sig = cx18_msleep_timeout(10, 1);
                cnt++;
        }
        if (sig)
                return -EINTR;
        if (cnt == 660) {
                cx18_writel(cx, oldreq, &mb->request);
                CX18_ERR("mb %s failed\n", info->name);
                return -EINVAL;
        }
        for (i = 0; i < MAX_MB_ARGUMENTS; i++)
                data[i] = cx18_readl(cx, &mb->args[i]);
        err = cx18_readl(cx, &mb->error);
        if (!in_atomic() && (info->flags & API_SLOW))
                cx18_msleep_timeout(300, 0);
        if (err)
                CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
                                info->name);
        return err ? -EIO : 0;
}

int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
{
        int res = cx18_api_call(cx, cmd, args, data);

        /* Allow a single retry, probably already too late though.
           If there is no free mailbox then that is usually an indication
           of a more serious problem. */
        return (res == -EBUSY) ? cx18_api_call(cx, cmd, args, data) : res;
}

static int cx18_set_filter_param(struct cx18_stream *s)
{
        struct cx18 *cx = s->cx;
        u32 mode;
        int ret;

        mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
        ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
                        s->handle, 1, mode, cx->spatial_strength);
        mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
        ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
                        s->handle, 0, mode, cx->temporal_strength);
        ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
                        s->handle, 2, cx->filter_mode >> 2, 0);
        return ret;
}

int cx18_api_func(void *priv, u32 cmd, int in, int out,
                u32 data[CX2341X_MBOX_MAX_DATA])
{
        struct cx18 *cx = priv;
        struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];

        switch (cmd) {
        case CX2341X_ENC_SET_OUTPUT_PORT:
                return 0;
        case CX2341X_ENC_SET_FRAME_RATE:
                return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
                                s->handle, 0, 0, 0, 0, data[0]);
        case CX2341X_ENC_SET_FRAME_SIZE:
                return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
                                s->handle, data[1], data[0]);
        case CX2341X_ENC_SET_STREAM_TYPE:
                return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
                                s->handle, data[0]);
        case CX2341X_ENC_SET_ASPECT_RATIO:
                return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
                                s->handle, data[0]);

        case CX2341X_ENC_SET_GOP_PROPERTIES:
                return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
                                s->handle, data[0], data[1]);
        case CX2341X_ENC_SET_GOP_CLOSURE:
                return 0;
        case CX2341X_ENC_SET_AUDIO_PROPERTIES:
                return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
                                s->handle, data[0]);
        case CX2341X_ENC_MUTE_AUDIO:
                return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
                                s->handle, data[0]);
        case CX2341X_ENC_SET_BIT_RATE:
                return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
                                s->handle, data[0], data[1], data[2], data[3]);
        case CX2341X_ENC_MUTE_VIDEO:
                return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
                                s->handle, data[0]);
        case CX2341X_ENC_SET_FRAME_DROP_RATE:
                return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
                                s->handle, data[0]);
        case CX2341X_ENC_MISC:
                return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
                                s->handle, data[0], data[1], data[2]);
        case CX2341X_ENC_SET_DNR_FILTER_MODE:
                cx->filter_mode = (data[0] & 3) | (data[1] << 2);
                return cx18_set_filter_param(s);
        case CX2341X_ENC_SET_DNR_FILTER_PROPS:
                cx->spatial_strength = data[0];
                cx->temporal_strength = data[1];
                return cx18_set_filter_param(s);
        case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
                return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
                                s->handle, data[0], data[1]);
        case CX2341X_ENC_SET_CORING_LEVELS:
                return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
                                s->handle, data[0], data[1], data[2], data[3]);
        }
        CX18_WARN("Unknown cmd %x\n", cmd);
        return 0;
}

int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
                u32 cmd, int args, ...)
{
        va_list ap;
        int i;

        va_start(ap, args);
        for (i = 0; i < args; i++)
                data[i] = va_arg(ap, u32);
        va_end(ap);
        return cx18_api(cx, cmd, args, data);
}

int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
{
        u32 data[MAX_MB_ARGUMENTS];
        va_list ap;
        int i;

        if (cx == NULL) {
                CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
                return 0;
        }
        if (args > MAX_MB_ARGUMENTS) {
                CX18_ERR("args too big (cmd=%x)\n", cmd);
                args = MAX_MB_ARGUMENTS;
        }
        va_start(ap, args);
        for (i = 0; i < args; i++)
                data[i] = va_arg(ap, u32);
        va_end(ap);
        return cx18_api(cx, cmd, args, data);
}